Gaya APA

Bieniawski.Z.T, . (1989). Engineering Rock Mass Clasification A Complete Manual for Enginers and Geologist in Mining,Civil and Petroleum Engineering (E-Book) . Canada: A Wiley Interscience Publication.

Gaya MLA

Bieniawski.Z.T, . "Engineering Rock Mass Clasification A Complete Manual for Enginers and Geologist in Mining,Civil and Petroleum Engineering (E-Book)". Canada: A Wiley Interscience Publication, 1989. E-book.